16./ ANIMATE Telemetry Meeting ANIMATE Telemetry Meeting

16./ ANIMATE Telemetry Meeting ORBCOMM Packet oriented data transfer Packet size < 300 byte recommended a stable end-end link is not required no real time data transfer possible Run Time (April-August 2002 one Message /Day) –max. delay 445h –average delay 67h –median 5,7h Run Time in November: –max. delay3.985h –average delay0.140h –median0.024h

16./ ANIMATE Telemetry Meeting

16./ ANIMATE Telemetry Meeting ORBCOMM Hardware Panasonic Transceiver KX-G7100 / KX-G7101 used 2m Band / ~137MHz Antenna cable length up to 50 m Different Antennas available Current (KX-G7100 / KX-G7101): –sleep1.2mA / 1.2mA –receive 35mA / 120mA –send600mA / 700mA

16./ ANIMATE Telemetry Meeting IRIDIUM Online Connection, not packet oriented Bidirectional real time data transfer Very stable Connection Reliable access / good satellite coverage Online Prices compare able to GSM 1.5€/min Voice, 0.5€/min Data Iridium Modem ~1000€ / Handy ~3000€ Data rate 2400 bps, but stable Iridium tested for 5 Weeks (NAL modems) on Poseidon north of Island – purposes on Uni-Bremen Mail server –login every Day 2 to 5 times / every time login at first attempt SMS like Data Service available (yet no experiences)

16./ ANIMATE Telemetry Meeting Iridium Hardware Handy’s and Modems available Frequency 1,6GHz NAL Modem Power –receive 150mA –sending 300mA short antenna cables required < 5m Different antennas available (Mast- Magnetic mount- Antenna etc.) Handy’s with modem Adapter available and reliable

16./ ANIMATE Telemetry Meeting

16./ ANIMATE Telemetry Meeting

16./ ANIMATE Telemetry Meeting Nutrient Analyser NAS-2E Serial Interface: RS232 Data will be sent as an online data stream Data Format S-NO3-SW ALG 14:47: :50: No commands possible A data logger is necessary to record all the data and to create the data packets for transmission